NearBy Photo Share uses Apple latest Bluetooth technology, connecting iPhone 6 and 6+ without WiFi and Carrier links. After connect with each other nearby, user can sent photos and messages to each other.
NearBy Hub is a conceptual connection point, used by Apple Bluetooth MCNearByService. In order for two iPhones connect with each other, both have to use the same Hub Name. It will start to advertise service and acepting connection with each other using Display Name. You can always goto "i" to change it. But you have to let your peer know this new Hub Name so he can fill in his iPhone to connect with you. You need to keep your Hub Name in private, otherwise, strangers can see your session invite. Currently, you can not save photos received from your peer. Finally, app will only work with 6, 6+. iPad air due to Bluetooth hardware they had built in.